Abstract
We characterized YBCO bulk superconductors that will be installed in the radial type superconducting magnetic bearing module for a 100 kWh class flywheel system. The inner-stator is a cylinder with the outer diameter of 208 mm, the inner diameter of 180 mm, and the height of 100 mm. At present the stator is planned to consist of 24 and 16 YBCO plates. We measured the trapped magnetic-field distribution of the YBCO plates that will be installed in the stator by using Hall probes at 77 K after having been cooled in the presence of 1.5 T. The peak field values ranged from 0.82 to 0.87 T. The field distribution suggested that the YBCO plates were almost single domain. We also measured the repulsive force between the YBCO bulk at 77 K and a permanent magnet with the magnetic surface induction of 0.37 T. The repulsive force was about 50 N at 1.5 mm gap.
| Original language | English |
|---|---|
| Pages (from-to) | 723-728 |
| Number of pages | 6 |
| Journal | Physica C: Superconductivity and its applications |
| Volume | 392-396 |
| Issue number | PART 1 |
| DOIs | |
| Publication status | Published - 2003 Oct |
| Externally published | Yes |
| Event | Proceedings of the 15th International Symposium on Superconduc - Yokohama, Japan Duration: 2002 Nov 11 → 2002 Nov 13 |
Keywords
- Repulsive force
- Superconducting magnetic bearing
- Trapped magnetic-field
- YBCO bulk superconductor
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering